Sorting files and searching can all be done form the side menu in OcuMap. Files can be sorted alphabetically in an ascending or descending order.
Expand the side menu, look for the search option, you will find the sorting icon to the right of it.
You can search for videos, images, KML/KMZ, WFS/WMS and Geotagged Points of Interest from the search bar. Expand the side menu and look for the search bar at the top.